Loading device for mixing-machines.



O. W. LEVALLEY.

LOADING DEVICE FOR MIXING MACHINES.

APPLICATION FILED NOV. 12, 1912, v

Patented July 8, 1913.

wuemtoz COLUMBIA PLANOGRAPH CD.,WASHINGTON, D. c

CHRISTOPHER W. LEVALLEY, 0F MILWAUKEE, WISCONSIN.

LOADING DEVICE FOR MIXING-MACHINES.

Specification of Letters Patent.

Patented JulyS, 1913.

Original app1ication filed March 29, 1910, Serial No. 552,128. Dividedand. this application filed November 12, 1912. Serial No. 730,958.

To all whom it may concern:

Be it known that I, CHRISTOPHER W. LEVALLEY, a citizen of the UnitedStates. residing at Milwaukee, in the county of Milwaukee and State ofWisconsin, have invented certain new and useful Improvements in LoadingDevices for h'l ixing-h Iachines, of which the following is aspecification.

This case is a division of my application filed March 29, 1910, SerialNo. 552,128, and the invention herein presented relates to means forloading mixing machines, it being particularly adapted for use inconnection ith large concrete mixers in which are employed revolvingdrums.

In the accompanying drawingsFigure 1 is a side elevation of a concretemixing machine in connection with which my present invention is shown.Fig. 2 is a detail view in perspective illustrating the invention.

In the accompanying drawings 2 designates the revolving drum orreceptacle of a concrete mixing machine which is represented as beingsupported on a portable truck 3. The drum is formed with an axial feedopening indicated at 7, and is also preferably provided with an axialdischarge opening 8, although the latter feature forms no part of thepresent invention.

4 designates a tilting loader into which the ingredients that are toenter into a batch of material to be mixed are placed and by which theyare delivered through the feed opening into the mixing drum. This loaderis pivotally supported upon a shaft 9 mounted in suitable bracketscarried by the front upright pieces 10 of a framework supported by thetruck and surrounding the drum. The loader is of such shape and theshaft 9 so located that when the loader is in its lowermost position, asindicated in full lines, Fig. 1, it rests upon the ground, and whenelevated, as indicated in dotted lines in Fig. 1, it occupies suchposition that its contents will be discharged into the mixing drumthrough the opening 7. The leader is provided with a pivoted bail 11,the crossbar 12 of which carries a sheave or pulley 13 around whichpasses the cable 1 1 by means of which the movements of the loader arecontrolled. In order to arrest the loader in proper positionfordischarging its contents into the drum, and to take from it strainsincident to overwinding of the cable 14, and to prevent damage to themachinery through careless manipulation of the loader-tilting devices, Iprovide a pair of stops 15, 15. These are supported by frame pieces 16which extend above and in front of the feed end of the drum, beingcarried outward beyond the upright frame pieces 10, to which they areconnected. The steps 15 are prefe ably arranged upon either side of thehead sheaves 0r pulleys 17 and are so disposed that contact blocks orcontact pieces 18 mounted upon the crossbar 12 of the bail of the loaderengage therewith when the loader comes into discharging position. Eachstep is preferably formed with widely separated legs 20, 20, that arebolted to a frame piece 16, and wit-l1 a flat, and approximatelyhorizontal, contact portion 21 between the outer ends of the said legs,with which a contact piece 18 engages. This construction produces astrong and well braced stop and insures that the shocks incident toarresting the loader when the machine is running rapidly shall bedistributed and so transmitted to the framework that breakage andinjurious straining are not likely to take place.

By causing the bail of the loader, which is an element of the train ofdevices through which its movements are controlled, to engage with thestops 15, instead of having the loader itself engage therewith, suchstrains as would be incident to any over winding of the cable areentirely taken oil the loader, which would not be the case should theloader engage directly with the stop, and this featureof constructionand arrangement I have found to be of advan tage in operating large andexpensive machines of the type illustrated.

-What I claim is 1. The combination with a receptacle, of a tiltingloader therefor, means for support ing the loader, during the tiltingoperation thereof, in position close to the receptacle so as todischarge its contents thereinto, a framework extending above and infront of the receptacle, a sheave supported in the said extended portionof the framework, a bail attached to the said loader, a cable forcontrolling the movements of the loader connected with the bail andpassing over the said sheave, and a stop also carried by the saidextended portion of the framework arranged to be engaged by the bail toarrest the movement of the loader when it has been tilted to dischargingposition.

2. The combination with a receptacle, of a loader pivotally supportedadjacent thereto and arranged when lifted to discharge its contents intothe receptacle, a framework extending in front of and above the feed endof the receptacle, a sheave supported in the said extended portion ofthe framework, a bail attached to the loader, a

cable for controlling the movements of the loader connected with thebail and passing over the said sheave, and a stop also carried by thesaid extended portion of the framework arranged to arrest the bail whenthe loader has been lifted to discharging position.

3. The combination with a receptacle, of a loader pivotally supportedadjacent lng over the said sheave, and a pair of stops supported by thesaid extended portion of the framework and disposed one on either sideof the sheave and having approximately horizontal portions adapted to beengaged by the said bail as it moves upward and the loader comes todischarging position.

CHRISTOPHER W. LEVALLEY. Witnesses:

CLfFroRD F. MEssINGER, WILLIAM W. COOHRANE.

{Iopies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents,

Washington, I). C.

